Alert archive / Michigan / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 4, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Apr 12, 2001, 1:13 AM EDT for Roscommon County, Michigan. It was in force for 47 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Apr 12, 2001, 1:13 AM EDT (05:13 UTC)
- Expired
- Apr 12, 2001, 2:00 AM EDT
- In force
- 47 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Roscommon County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 12, 1:26 AM EDT | Hail 0.75 | Houghton Lake, MI | |
| Apr 12, 1:26 AM EDT | Thunderstorm Wind 50 E | Houghton Lake, MI | Several large trees down. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 12, 12:00 AM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Alpena, MI (KAPX), launched 00:00Z, 5.2 hours before the alert went out and 193 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 550 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 463 m²/s²
- 0-3 km storm-relative helicity
- 560 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
057
WUUS53 KAPX 120512
SVRAPN
MIC143-120600-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
113 AM EDT THU APR 12 2001
THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
ROSCOMMON COUNTY IN NORTHERN LOWER MICHIGAN
* UNTIL 200 AM EDT
* AT 113 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS FROM HIGGINS LAKE TO 10 MILES
WEST OF CLARE...MOVING NORTHEAST AT 60 MPH.
* THE SEVERE THUNDERSTORMS WILL REACH...
HIGGINS LAKE...HOUGHTON LAKE AROUND 115 AM EDT
NORTH HIGGINS LAKE PARK AROUND 120 AM EDT
ROSCOMMON AROUND 130 AM EDT
ST. HELEN AROUND 150 AM EDT
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS OCCASIONALLY PRODUCE TORNADOES...AND CAN DO SO RATHER
QUICKLY. MOVE INTO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS.
REMAIN INDOORS AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. THIS
STORM IS CAPABLE OF PRODUCING WIND GUSTS BETWEEN 60 AND 70 MPH ALONG
WITH DIME SIZED HAIL. WINDS THIS HIGH CAN DOWN TREES AND POWER LINES.
LAT...LON 4417 8455 4434 8437 4451 8437 4451 8485
4417 8485The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 9:23 PM EDT | Flash Flood Warning | APX | Montmorency | 3 hr |
| Apr 11, 10:11 PM EDT | Severe Thunderstorm Warning | APX | Gladwin | 34 min |
| Apr 11, 10:20 PM EDT | Severe Thunderstorm Warning | APX | Ogemaw | 40 min |
| Apr 12, 12:10 AM EDT | Flash Flood Warning | APX | Crawford, Montmorency | 6 hr |
| Apr 12, 12:45 AM EDT | Severe Thunderstorm Warning | APX | Missaukee | 45 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.